.demo03{
  height: 400px;
  background: antiquewhite;
  padding: 50px;
  p{
    font-size: 20px;
    margin: 20px 0;
  }
  input{
    border: 1px solid grey;
    width: 200px;
    height: 30px;
  }
  button{
    width: 100px;
    height: 30px;
    background: grey;
  }
}